JK-BMS stale connections

[kruisdraad]

Hi,

With BATMON i have monitoring 3x JK-BMS (v15). This is working fine, however if you restart batmon, or some conditions restarts a session BATMON cannot connect to 1 or more batteries and never recovers from that. This is due the JK-BMS only allows 1 connections at the time and still sees BATMON session previously PID connected.

To solve this , stop BATMON, use bluetoothctl to issue a power off / power on. Then start BATMON again. Now everything is back to normal.

Therefor i suggest when batteries cannot connect allow a POWER-OFF/ON . This would be archived with bt_power_cycle (i think , documentation is not really clear) ... but it logs:

15:49:18 INFO [main] Power cycle bluetooth hardware
Unable to open mgmt_socket
Unable to open mgmt_socket

So it is not clear if a power reset actually occured :/

[burtonrosenberger]

Out of the box with stock config set to 1 for sample time, IIRC, the batmon locks onto the Jk's for life even on a restart. Change the sample time to something higher, I have mine at 60, and adjust the publish period to be at least a second longer. This will also allow your phone app to still connect.

I have restarted batmon several times since and it has never retained a connection to my 4 jk's after this. I also turned off concurrent readings IIRC.

Your solution sounds better if you want a higher sample rate and don't care about tying up the BT connection.